For Grouping and Tabbing:SUPER+S = select single windowSUPER+T = tab groupSUPER+Left = change left tabSUPER+Right = change right tabSUPER+G = group windowsSUPER+U = ungroup windowsSUPER+R = remove group windowSUPER+C = close groupSUPER+X = ignore group
Hold the SUPER button then select the windows you want to group and then hit SUPER+G.